Dead trees and branches are most likely to pose a hazard during storms, and broken or ragged branches are more likely to develop tree-weakening diseases. Late-winter or early spring pruning is best for most trees, since it allows the tree to concentrate its stored energy on fewer branches; it's also a less busy time for tree surgeons and arborists.

Our " How to Prune Trees" primer offers detailed instructions and diagrams on pruning small and thinning branches and heading and topping larger branches. Before you do any pruning, review these instructions on chain saw and ladder safety.

More complex cuts, such as three-saw cuts to heavy branches and those to branches that could fall onto a structure or street or run near power lines, are best left to professionals. Before you hire a pro, check with the utility that owns the wires since it might prefer to manage the pruning itself.